package com.food.order.utils.utils;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextProvider implements ApplicationContextAware {
/**
   * 上下文对象实例
   */
    private static ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }
    /**
   * 获取applicationContext
   *
   * @return
   */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
    /**
   * 通过name获取 Bean.
   *
   * @param name
   * @return
   */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
    /**
   * 通过class获取Bean.
   *
   * @param clazz
   * @param <T>
   * @return
   */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }
    /**
   * 通过name,以及Clazz返回指定的Bean
   *
   * @param name
   * @param clazz
   * @param <T>
   * @return
   */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}
